diff --git a/Dockerfile b/Dockerfile
index 0b6189c7..1bd56971 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM fpco/pid1:18.04
 
 ENV HOME /home/stackage
 ENV LANG en_US.UTF-8
-ENV GHCVER 8.6.4
+ENV GHCVER 8.6.5
 
 # NOTE: also update debian-bootstrap.sh when cuda version changes
 ENV PATH /home/stackage/.stack/programs/x86_64-linux/ghc-$GHCVER/bin:/usr/local/cuda-10.0/bin:/usr/sbin:/usr/bin:/sbin:/bin
diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9ab2361e..cfa2b017 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1,6 +1,6 @@
 ghc-major-version: "8.6"
 # new curator is supposed to use exact GHC version
-ghc-version: "8.6.4"
+ghc-version: "8.6.5"
 
 # This affects which version of the Cabal file format we allow. We
 # should ensure that this is always no greater than the version
diff --git a/check b/check
index 9ed2b812..b28ba8bb 100755
--- a/check
+++ b/check
@@ -3,4 +3,4 @@
 # Convenience script for checking constraints locally
 
 cd `dirname $0`
-exec stack exec --resolver ghc-8.6.4 stackage-curator check
+exec stack exec --resolver ghc-8.6.5 stackage-curator check
diff --git a/etc/ci-script.sh b/etc/ci-script.sh
index c70f2b32..66e04114 100755
--- a/etc/ci-script.sh
+++ b/etc/ci-script.sh
@@ -2,7 +2,7 @@
 
 set -euxo pipefail
 
-export GHCVER=8.6.4
+export GHCVER=8.6.5
 
 # Download and unpack the stack executable
 mkdir -p ~/.local/bin